Canister Purge Control Valve: Testing and Inspection

EVAP CANISTER PURGE VALVE AND ITS CIRCUIT CHECK
1. Disconnect vacuum hoses from vacuum pipes.




2. With ignition switch ON, blow into hose "A". Air should not come out of hose "B".




3. When using SUZUKI scan tool, perform the following procedure.
a. Connect SUZUKI scan tool (1) to DLC (2) with ignition switch OFF.
b. Turn ON EVAP canister purge valve by using SUZUKI scan tool with ignition switch ON.

In this state, blow hose "A".

Air should come out of hose "B".

If check results are as described above, EVAP canister purge valve and its circuit are in good condition, connect vacuum hoses securely.

If not, proceed to step 5).

WARNING: Do not suck the air through valve. Fuel vapor inside valve is harmful.




4. When not using SUZUKI scan tool, perform the following procedure.
a. Using service wire, connect C51-3-1 terminal of ECM (PCM) coupler and body ground with ignition switch OFF.
b. Turn ON ignition switch.
In this state, blow hose "A".
Air should come out of hose "B".

If check results are as described above and C51-3-1 terminal to ECM connection is OK, EVAP canister purge valve and its circuit are in good condition, connect vacuum hoses securely.

If not, proceed to step 5).

WARNING: Do not suck the air through valve. Fuel vapor inside valve is harmful.

5. With ignition switch OFF, disconnect coupler from EVAP canister purge valve.




6. Check resistance between two terminals of EVAP canister purge valve.

If resistance is as specified, proceed to next operation check.

If not, replace.

Resistance of EVAP canister purge valve:
28 - 36 ohm (at 20 °C (68 °F))




7. With coupler disconnected, blow into hose "A". Air should not come out of hose "B".

If not, replace EVAP canister purge valve.




8. Connect 12 V battery to solenoid purge valve terminals. In this state, blow hose "A".

Air should come out of hose "B".

If check result is as specified above, check EVAP canister purge valve harness.

If not, replace EVAP canister purge valve.

WARNING: Do not suck the air through valve. Fuel vapor inside valve is harmful.

9. Connect vacuum hoses.
10. Connect EVAP canister purge valve coupler securely.